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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="gtkrecent-advanced"></a>Advanced usage</h2></div></div></div>
<p>
      The <a class="link" href="GtkRecentChooser.html" title="GtkRecentChooser"><span class="type">GtkRecentChooser</span></a> widgets might display items sorted and filtered,
      either with already supplied or custom sorting and filtering functions.
      The biggest difference from the <span class="structname">EggRecentView</span>
      widgets in EggRecent is that the <a class="link" href="GtkRecentChooser.html" title="GtkRecentChooser"><span class="type">GtkRecentChooser</span></a> widgets will use
      their own copy of the list and will apply the sorting and filtering
      functions only on the copy; this allows the creation of many viewers
      with a single controller, like using many <a class="link" href="GtkTreeView.html" title="GtkTreeView"><span class="type">GtkTreeView</span></a> with a single
      <a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> instance.
    </p>
<p>
      Available sorting methods are:
      </p>
<div class="informalexample"><pre class="programlisting">
        /* no sorting */
	gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser), GTK_RECENT_SORT_NONE);
	
        /* most recently used first */
	gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser), GTK_RECENT_SORT_MRU);
	
	/* most recently used last */
	gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser), GTK_RECENT_SORT_LRU);
      </pre></div>
<p>
      You can create your own sorting function, and the use the
      GTK_RECENT_SORT_CUSTOM method:
      </p>
<div class="informalexample"><pre class="programlisting">
	/* custom sorting function, based on the registration count
	 * (most used first)
	 */
	static void
	sort_by_usage_count (GtkRecentInfo *a,
                             GtkRecentInfo *b,
                             gpointer       data)
        {
	  gint count_a, count_b;

	  count_a = count_b = 0;

	  if (gtk_recent_info_has_application (a, APP_NAME))
	    gtk_recent_info_get_application_info (a, APP_NAME, NULL, &amp;count_a, NULL);

	  if (gtk_recent_info_has_application (b, APP_NAME))
	    gtk_recent_info_get_application_info (b, APP_NAME, NULL, &amp;count_b, NULL);

	  return count_a &lt; count_b;
	}

	...

	  /* set custom sorting and set the custom sorting function */
	  gtk_recent_chooser_set_sort_type (GTK_RECENT_CHOOSER (chooser),
	                                    GTK_RECENT_SORT_CUSTOM);
	  gtk_recent_chooser_set_sort_func (GTK_RECENT_CHOOSER,
	                                    sort_by_usage_count,
			  		    NULL, /* sort function data */
					    NULL  /* destroy notify for the data */);
      </pre></div>
<p>
    </p>
<p>
      Filtering is done using the <a class="link" href="GtkRecentFilter.html" title="GtkRecentFilter"><span class="type">GtkRecentFilter</span></a> object, similar to the
      <a class="link" href="gtk-gtkfilefilter.html#GtkFileFilter"><span class="type">GtkFileFilter</span></a> object used by the <a class="link" href="GtkFileChooser.html" title="GtkFileChooser"><span class="type">GtkFileChooser</span></a> widgets. The
      <a class="link" href="GtkRecentFilter.html" title="GtkRecentFilter"><span class="type">GtkRecentFilter</span></a> object has a set of pre-defined options based on the
      meta-data exposed by the <a class="link" href="GtkRecentManager.html#GtkRecentInfo" title="GtkRecentInfo"><span class="type">GtkRecentInfo</span></a> object. It also allows custom
      filtering function:
      </p>
<div class="informalexample"><pre class="programlisting">
        GtkRecentFilter *filter;

	filter = gtk_recent_filter_new ();
	
	/* set the user visible name of the filter */
	gtk_recent_filter_set_name (filter, "Since Last Month");

	/* set the maximum age of a recently used document */
	gtk_recent_filter_set_age (filter, 31);

	/* the chooser takes the ownership of the object */
	gtk_recent_chooser_add_filter (GTK_RECENT_CHOOSER (chooser), filter);

	/* set the currently used filter */
	gtk_recent_chooser_set_filter (GTK_RECENT_CHOOSER (chooser), filter);

	filter = gtk_recent_filter_new ();
	gtk_recent_filter_set_name (filter, "Every text file");
	gtk_recent_filter_set_mime_type (filter, "text/plain");

	gtk_recent_chooser_add_filter (GTK_RECENT_CHOOSER (chooser), filter);
      </pre></div>
<p>
      The <a class="link" href="GtkRecentChooserWidget.html" title="GtkRecentChooserWidget"><span class="type">GtkRecentChooserWidget</span></a> and <a class="link" href="GtkRecentChooserDialog.html" title="GtkRecentChooserDialog"><span class="type">GtkRecentChooserDialog</span></a> widgets allow
      multiple filters and the selection of an appropriate one; the
      <a class="link" href="GtkRecentChooserMenu.html" title="GtkRecentChooserMenu"><span class="type">GtkRecentChooserMenu</span></a> widget allows just a single filter object.
    </p>
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